Astonishing X-Men:
Whedon hasn't skipped a beat with this title. The action is frenzied but at the same time, methodical in it's pacing. The characterization is expansive, and well intergrated with Whedon's more humorous style. His ability to derive a comedic take from serious siituations, never ceases to impress me. 16 issues later, and the book is still impressive. Funny directors seem to be really good at injecting old characters, with new life (such as Green Arrow's relaunch, by Kevin Smith).
Uncanny X-Men:
Ed Brubaker is a man you can never go wrong with. His talent for dialogue is more than well established. The simple fact that he rounded out the last issue of Claremont's run on Uncanny, without wrecking the pacing, shows how skillful he is. Also, since Uncanny just recently started a new arc, it's much more easy to jump into. The continuity is thick, but it doesn't bear down on you, in such a fashion, that you feel lost in a sea of information.
I would hope that my post will inspire other people to do more than make generic lists. Nobody really cares about what your opinoin is, as much as they care about, why you have it. Anybody can take two random seconds to post down a couple of names. But it takes effort to plot out your reason. It also gives people something to reflect upon and respond to, when you actually say something.